WM8955L
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DEVICE ADDRESS RD / WR
(7 BITS) BIT
ACK
(LOW)
CONTROL BYTE 1
(BITS 15 TO 8)
ACK
(LOW)
CONTROL BYTE 1
(BITS 15 TO 8)
ACK
(LOW)
SDIN
SCLK
START
STOP
register address and
1st register data bit
remaining 8 bits of
register data
Figure 16 2-Wire Serial Control Interface
The WM8955L has two possible device addresses, which can be selected using the CSB pin.
CSB STATE
Low
DEVICE ADDRESS
0011010
High
0011011
Table 25 2-Wire MPU Interface Address Selection
Product Preview Rev 0.4 May2003
34
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